120210200021221 has 4 divisors (see below), whose sum is σ = 120225507580332. Its totient is φ = 120194892462112.

The previous prime is 120210200021183. The next prime is 120210200021251. The reversal of 120210200021221 is 122120002012021.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18856872002500 + 101353328018721 = 4342450^2 + 10067439^2 .

It is a cyclic number.

It is not a de Polignac number, because 120210200021221 - 2²³ = 120210191632613 is a prime.

It is a super-2 number, since 2×120210200021221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120210200021195 and 120210200021204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120210200021251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7653767776 + ... + 7653783481.

It is an arithmetic number, because the mean of its divisors is an integer number (30056376895083).

Almost surely, 2^{120210200021221} is an apocalyptic number.

It is an amenable number.

120210200021221 is a deficient number, since it is larger than the sum of its proper divisors (15307559111).

120210200021221 is an equidigital number, since it uses as much as digits as its factorization.

120210200021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15307559110.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 120210200021221 its reverse (122120002012021), we get a palindrome (242330202033242).

The spelling of 120210200021221 in words is "one hundred twenty trillion, two hundred ten billion, two hundred million, twenty-one thousand, two hundred twenty-one".